杀菌剂Triadimefon和Cd对水生生物的联合毒性

Complex Toxicity of Triadimefon and Cd Towards Aquatic Organisms

采用静态试验方法研究了Triadimefon和Cd对水生生物浮萍和彭泽鲫的毒性作用。结果表明,Triadimefon和Cd对浮萍的联合毒性IC50值为9.19mg·L-1,对浮萍叶绿素a含量的影响随浓度增加显著增强。联合作用对彭泽鲫LC50值为18.78mg·L-1,说明浮萍要比彭泽鲫更为敏感。在模拟的3种水生环境中,联合毒性影响顺序如下:浮萍为自来水>河水>蒸馏水,彭泽鲫为蒸馏水>自来水>河水。

A static experiment was made to probe into complex toxicity of fungicide triadimefon and cadmium （Cd^2＋） to assess eco-environment effects and toxicity correctly. The results showed that IC50 of complex effects on duckweed was 9.19 mg·L^-1 and effects on concentration of chlorophyll A were heightened with increase concentrations of the xenobiotics. In addition, the LC50 of complex effect on Carassius auratus variety pengze was 18.78 mg·L^-1, less sensitive than duckweed. The effects of complex toxicity on duckweed and Carassius auratus variety pengze in different simulated aquatic solutions showed a following sequences： tap water〉river water〉distilled water, or, distilled water〉tap water〉river water. The sequences showed that the different simulated aquatic solutions have different effects on duckweed and Carassius auratus variety pengze when they were received the same treatment, which was more distinct in duckweed than in Carassius auratus variety pengze. The dissimilar substances included in the different aquatic biology induced the diverse results.